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femto 1 days ago [-]
An Orthogonal Frequency Division Multiplexing fax machine!
StizzurpXDD 1 days ago [-]
A good way to send encrypted pictures. Just convert the images into audio, and nobody would even think to look at the spectrogram of the audio file. Nice.
rotten 1 days ago [-]
Better than playing a record backwards to find the hidden messages. Instead you can find hidden images in recordings.